Fuel-supply means for engines



Dec. 10, 1929. b. c. KREIS FUEL SUPPLY MEANS FOR ENGINES F iled Nov. so. 192'? 2 SheetS -Shet 1 INVEN TOR. dime 5. Kfif/fi A TTORNEYQ Dec. 10, 1929. I ac. KREIS 1,739,317

' FUEL SUPPLY mms FOR mamas Filed Nov. 30, 1927 V2 Sheets-Sheet 2 m I] K 9 [NI 'EXTOR.

ATTORNEY.

PatentedDec. '10, 1929 OSCAR G. KREIS,1OI DETROIT, MICHIGAN,

ASSIGNOB T0 CONTINENTAL IIOTORS COR- POBATION, OF DETROIT, MICHIGAN, A CORPORATION OF VIRGINIA.

FUEL-SUPPLY MEANS FOR ENGINES Application filed November 30, 1927. Serial No. 236,632.

This invention relates to internal combustion engines and refers more particularly to a fuel supply means for conducting a fuel mixture tothe various cylinders of the engine. My invention also relates to an engine cylinder block construction cooperating with a manifold for supplying the engine cylinders with a fuel mixture. A still further feature of my invention resides in an improved intake manifold construction.

My manifold is particularly adapted for use in connection with sleeve valve engines and has among its objects the provision of a manifold and engine construction which will supply the cylinders with fuel mixture with improved distribution efliciency, effecting an increase in en ine power and generally improved and e cient engine performance.

Further objects and advantages of my invention willbe apparent as the following description progresses, the accompanying drawings serving to illustrate one embodiment thereof.

In the drawings,

' Fig. 1 is a top plan view of my improved manifold, showing the same associated with an engine,

f .i'fziig. 2 is a side elevation view of the mani- Fig. 3 is a detail elevation view of the engine cylinder ortion to which one of the manifold branc es is connected.

/ Figs. 4, 5, and 6, are sectional views respectively along 4-4, 5-5, and 6-6 of v l F Fig. 7 is a sectional view through 77' of Fig. 8 is a sectional view through -88 of Fig. 1, and

Fig. 9 is a view corresponding to Fig. 8, and illustrating a modification thereof.

Referring to the drawings, reference character A represents the en ne cylinder block having a-plurality of aligned cylinders 10- illustrated as the sleeve valve type. The cylinders 10 have exhaust and intake ports 11 and 12 respectively which coact in the well known manner with the ports of a sleeve or sleeves (not shown) usually located within the cylinders. The ports 11 communicate with cylinder exhaust chambers13 and the intake ports 14 communicate with cylinder intake chambers 15. In the six cylinder engine illustrated, the chambers 15 are each preferably arranged to communicate with a number of cylinders, one or more dividing walls 16 serving to form the grouping. In the embodiment illustrated the chambers 15 respectively supply one half the engine cylinders. Each chamber 15 terminates in a cylinder mixture cylinders.

The intake manifold B for convenience is provided with the usual fue mixture or ear buretor attaching flange '18 a chamber 19 receiving the fuel mixture from the carburetor (not shown From the chamber 19 the mixture is dlvided by plurality of branches 2O terminating in openings 21 which communicate with the cylinder openings 17. If desired the chamber 19 may be jacketed at 22 for heating, 23 representing-the jacket exhaust gas inlet and 25 the outlet. The branches 20 preferably have the chamber division 24 serving to divide the intake gases into portions corresponding with the number of manifold branches 20. One important feature of my invention resides in changing the cross section of the manifold branches .20 fromv the chamber 19 to the outlet 21 so that the gases are discharged into the cylinder intake chambers 15 in a flattened jet-like formation. It is desirable however that the cross-sectional area of the branches remain substantially constant, the cross-section preferably gradually approaching the elongated discharge opening 21 so as to minimize the frictional losses of the gas column and to in general produce an eflicient manifold. The gradually changing crosssection is apparent particularly from Figs. 3 to 7 inclusive which the branches 20 may be shaped.

The top wall of each branch20 preferably slopes downwardly as it approaches the elongated discharge opening 21, best shown in show one way in which Fig. 2,..so that the unvaporized or wet particles of the intake mixture will remain in contact with the upper wall passing downformed with an inlet passage registering directly with the-branch discharge 21, it being only necessary that-the gases have sufficient room to pass substantially unrestrictedly to the cylinder intake ports 12, particularly to the outside cylinders of each group. The discharge outlet 21 may have its terminal portion flared longitudinally, as shown in Fig. 1, so as to be slightly in excess of the uniform cross-sectional area of the branch 20 somewhat facilitating the gas intake as will presently be apparent. As shown in Fig. 8

I also prefer to locate the upper wall of the branch 20 at the discharge outlet 21 toward the top of the ,chamber so that the wet particles, in falling from the upper wall of the manifold discharge outlet 21, will be caught by the gas jet'sweeping downwardly toward the cylinder ports 12 and be carried thereinto. As shownin Fig. 8 the upper walls of the branch and chamber 15 are in substantially direct registration.

In operation the intake gases enter the chamber-19 where they are divided into branches 2O. As the gas column "passes through each branch '20 it is' flattened and elongated 'lon itudinally, the" centrifugal force causing t ie'wet particles to accumulate mostly along the top wall .of the branch conflared ends of the openings 21 facilitating in duit. As the cylinders communicatingwith the chamber 15 successively undergo their intake period as determined by the firing order of the engine, the flattened discharge jet from the outlet 21 sweeps back and forth longitudinally .of the engine, the terminal this fan-like sweeping action. At the same time the wet particles .of gas dripping from the manifoldbranch discharge ends are carried by the jet into the various cylinder ports. By flattening the gas column in the foregoing manner the gases are directed toward the cylinder intake ports in a veryefiicient manner, the general performance ofthe engine being improved over the well known types of intake gas conducting systems and construe tions.

In Fig. 9 I have provided a longitudinally extending filler strip or insert 26 for the chamber 15 which serves to fill the floor of this chamber along the manifold branch discharge to prevent accumulations of such wet 7 particles of gas that might escape being carried into the cylinder ports 12. The top 27.

of the insert 26 in the embodiment illustrated may form a continuation of the bottom of the wall of the manifold branch 20 with the ledge 28 above the bottom of'the cylinder ports 12 facilitating in carrying any wet par? ticles accumulating at the ledge 28 into the cylinder ports. In this modification the chamber 15 is constructed somewhat higher than in Fig. 8 to provide the necessary area for the gas flow.

What I claim as my invention is 1l In an engine the combination of a plurality of engine cylinders each provided with an intake port, a chamber for the intake mixture communicating with the intake ports of said cylinders, and means for directing fuel mixture in the form of a flattened jet into said chamber for passage into said intake ports. I

2. In an engine the combination of a plurality of engine cylinders each provided with an intake port, a chamber for the intake mixture communicating with the intake ports of said cylinders, and means for directing fuel mixture in the form of a flattened jet into said chamber for passage into said intake ports, said intake mixture chamber. partially surrounding said cylinders. f

3. In an engine the combination of a plu rality of engine cylinders each provided with an intake port, a chamber for the intake mixturecommunicating with the-intake ports of said cylinders, and means for directing fuel mixture in the form of a flattened jet into said chamber for passage into said intake ports, the flattened. jet sweeping the chamber.

4.;In an engine the combination of a plurality of engine cylinders each provided with an-intake port, a chamber for the intake mixture communicating with the intake ports of said cylinders, and means for directing fuel mixture in the form of a flattened jet into ports," the flattened jet sweeping fan-like longitudinally of the engine within the chamber successively toward the intake ports of the cylinders.

5. In a sleeve valve engine the combinasaid chamber for passage into said intake tion of a plurality of engine cylinders each of a plurality of engine cylinders each provided with a plurality of intake ports arranged in spaced relationship about a portion of the cylinder, a fuel intake chamber surrounding the ported portions of the cylinders and directly communicating with the intake ports of the cylinders, and means for directing fuel mixture in the form of a fiattened jet into said chamber, said jet sweep ing fan-like longitudinally of the engine within the chamber successively toward the ports. of the cylinders. I

7 In an engine the combination with a plurality of cylinders, of an intake manifold for supplying a fuel mixture to said cylinders, said manifold being constructed to flatten the gas column and to elongate the gas column longitudinally of the engine progressively during travel of the fuel mixture through the manifold.

8. In an engine the combination with a plurality of cylinders, of an intake manifold for supplying a fuel mixture to said cylinders, said manifold being constructed to flatten the gas column and to elongate the gas column longitudinally of the engine during travel of the fuel mixture through the manifold, the cross-sectional area of the gas column remaining substantially constant.

4 intake ports of the particles to travel 9. In a sleeve valve engine the combination of a plurality of engine cylinders each provided with a plurality of intake ports arranged in spaced relationship about a portion of the cylinder, a fuel intake chamber surrounding the ported portions of the cylinders and directly communicating with the cylinders, and 'an intake manifold for conducting a fuel mixture column into said chamber, said manifold .being constructed to progressively flatten and elongate the column during passage of the fuel mixture through the manifold.

10. In'an engine the combination with a plurality of cylinders, of an intake manifold for supplying .a fuel mixture to said cylinders, said manifold being constructed to flatten the gas column and to elongate the gas column longitudinally of the engine during travel of the fuel mixture through the manifold, the manifold cross-sectional area,-

being substantially constant, theupper wall of the manifold-sloping downwardly to the manifold discharge end causing wet fuel along the said upper wall.

11. tion of a plurality of engine cylinders each provided with a plurality of intake ports arranged in spaced relationship about a. portion of the cylinder, a fuel intake chamber surrounding the ported portions of the cylinders and directly communicating with the intake ports of the cylinders, and an intake manifold for conducting a fuel mixture column into said chamber,'the manifold crosssectional area being substantially constant, said manifold being constructed to flatten and elongate the column during passage of the fuel mixture through the manifold,.the upper wall of the manifold'sloping downwardly to the manifold discharge end causing wet fuel particles to travel along'the said upper wall.

12. In an engine the combination of' a plurality of engine cylinders each provided surrounding the In a sleeve valve engine the combinawith an intake port, a chamber for the intake mixture communicating with the intake ports of said cylinders, and means for directing fuel mixture in theform of a flattened jet into said chamber above the said ports for passage thereinto. 13. In a sleeve valve engine the combination of a plurality of engine cylinders each provided with a plurality of intake ports arranged in spaced relationship about a portion of the cylinder, a fuel intake chamber ported portions of the cylinders and directly communicating with the intake ports of the cylinders, and means for directing fuel mixture in the form of a longitudinally extending band into said chamber, at a point generally above the cylinder intake ports. v

14. In a sleeve valve engine the combination of a plurality of engine cylinders each provided with a plurality of intake ports arranged in spaced relationship about a portion of the cylinder, a fuel intake chamber surrounding the ported portions of the cylinders and directly communicating with the intake ports of the'cylinders, and an intake manifold for conducting a fuel mixture column into said chamber, said manifold being constructed to flatten and elongate the column during passage of the fuel mixture through the manifold, said manifold communicating with the chamber above the cylinder intake ports.

15. In a sleeve valve engine the combination of a plurality of engine'cylinders each providing with a plurality of,intake ports arranged in spaced relationship about a portion of the cylinder, independent fuel mixa; manifold having branched fuel mixture supply portions respectively communicating with the said chambers, each of said branches having a substantially constant cross-section al area constructed to flatten the fuel mixture column passing therethrough into a relative-' ly thin elongated band discharging, into the chamber.

16. In a sleeve valve engine the combination of a plurality of engine cylinders each provlded with a tion of the cylinder, independent fuel mixture chambers each surrounding the ported.

plurality of intake ports ar- 'ranged in spaced relationship about a por discharging into the \i 9 provided with a plurality of intake ports arranged in spaced relationship about a portion of the cylinder, independent fuel mixture chambers each surrounding the ported portions of a plurality of said cylinders, and a manifold having branched fuel mixture supply portions respectively communicating with the said chambers, each of said branches having a substantially constant cross-sectional 10 area constructed to flatten the fuel mixture column passing therethrough into a relatively thin elongated band discharging into the chamber, the upper wall of each branch sloping downwardly toward the discharge end thereof.

18. In a sleeve valve engine the combination with a cylinder provided with. an intake port, a fuel mixture chamber surrounding the ported portion of the cylinder and having a fuel mixture intake opening, and a fuel mixture supply device having a discharge opening communicating with the upper portion of the chamber intake opening. I

19. In a sleeve valve enginethe combination with a cylinder provided with an intake port, a fuel mixture chamber surrounding the ported portion of the cylinder and having a fuel mixture intake opening, a fuel mixture supply conduit opening into said chamber,

and means for directing wet particles of the fuel mixture from'the fuel mixture supply conduit into the cylinder intake port.

20. In a sleeve valve engine the combination with a cylinder provided with an intake port, a fuel mixturechambersurrounding the ported portion of the cylinder and having a fuel mixture intake opening, a fuel mixture supply device having a discharge opening communicating with the upper portion of the 40 chamber intake opening, and a filler strip positioned along the fioor of the chamber.

In witness whereof, I hereunto subscribe my7name this 28th day of November, A, D. 192 v p ,OSCAR C. KREIS. 

